127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/*
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* Copyright 2017, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <debuggerd/client.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <chrono>
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#include <thread>
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#include <vector>
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#include <gtest/gtest.h>
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#include <android-base/file.h>
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#include <android-base/properties.h>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include <android-base/unique_fd.h>
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#include "util.h"
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using namespace std::chrono_literals;
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using android::base::unique_fd;
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static int getThreadCount() {
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int threadCount = 1024;
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std::vector<std::string> characteristics =
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android::base::Split(android::base::GetProperty("ro.build.characteristics", ""), ",");
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if (std::find(characteristics.begin(), characteristics.end(), "embedded")
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!= characteristics.end()) {
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// 128 is the realistic number for iot devices.
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threadCount = 128;
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}
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return threadCount;
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}
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TEST(debuggerd_client, race) {
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static int THREAD_COUNT = getThreadCount();
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pid_t forkpid = fork();
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ASSERT_NE(-1, forkpid);
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if (forkpid == 0) {
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// Spawn a bunch of threads, to make crash_dump take longer.
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std::vector<std::thread> threads;
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for (int i = 0; i < THREAD_COUNT; ++i) {
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threads.emplace_back([]() {
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while (true) {
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std::this_thread::sleep_for(60s);
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}
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});
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}
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std::this_thread::sleep_for(60s);
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exit(0);
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}
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unique_fd pipe_read, pipe_write;
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ASSERT_TRUE(Pipe(&pipe_read, &pipe_write));
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// 16 MiB should be enough for everyone.
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constexpr int PIPE_SIZE = 16 * 1024 * 1024;
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ASSERT_EQ(PIPE_SIZE, fcntl(pipe_read.get(), F_SETPIPE_SZ, PIPE_SIZE));
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// Wait for a bit to let the child spawn all of its threads.
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std::this_thread::sleep_for(1s);
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ASSERT_TRUE(
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debuggerd_trigger_dump(forkpid, kDebuggerdNativeBacktrace, 60000, std::move(pipe_write)));
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// Immediately kill the forked child, to make sure that the dump didn't return early.
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ASSERT_EQ(0, kill(forkpid, SIGKILL)) << strerror(errno);
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// Check the output.
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std::string result;
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ASSERT_TRUE(android::base::ReadFdToString(pipe_read.get(), &result));
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// Look for "----- end <PID> -----"
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int found_end = 0;
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std::string expected_end = android::base::StringPrintf("----- end %d -----", forkpid);
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std::vector<std::string> lines = android::base::Split(result, "\n");
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for (const std::string& line : lines) {
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if (line == expected_end) {
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++found_end;
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}
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}
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EXPECT_EQ(1, found_end) << "\nOutput: \n" << result;
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}
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TEST(debuggerd_client, no_timeout) {
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unique_fd pipe_read, pipe_write;
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ASSERT_TRUE(Pipe(&pipe_read, &pipe_write));
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pid_t forkpid = fork();
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ASSERT_NE(-1, forkpid);
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if (forkpid == 0) {
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pipe_write.reset();
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char dummy;
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TEMP_FAILURE_RETRY(read(pipe_read.get(), &dummy, sizeof(dummy)));
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exit(0);
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}
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pipe_read.reset();
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unique_fd output_read, output_write;
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ASSERT_TRUE(Pipe(&output_read, &output_write));
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ASSERT_TRUE(
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debuggerd_trigger_dump(forkpid, kDebuggerdNativeBacktrace, 0, std::move(output_write)));
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}
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